Microsoft will reportedly unveil sequels to its first two Surface tablets at its Build developer conference, which is scheduled to run from June 26th through June 28th. Unnamed sources from Microsoft’s supply chain have told Digitimes as much, and they claim initial components for the Intel-based version of the next-generation Surface began shipping in late 2012. According to the report, the next-generation Surface tablets will be smaller than the current models, with screens measuring between 7 and 9 inches diagonally. An earlier report suggested that Microsoft is developing an “Xbox Surface” gaming tablet with a 7-inch 720p display and an ARM-based Texas Instruments processor, but it is unclear if this gaming device is one of the tablets mentioned in Digitimes’ report.